CAJ | 학술논문

文中以解决VoIP系统的语音质量问题为目标,深入研究了基于SIP的VoIP系统QoS控制技术。参照IMS网络结构,考虑通信业务的QoS要求,研究以SIP为信令协议的VoIP系统如何进行呼叫控制、资源预留和策略决策,融入到SIP用户代理、SIP代理服务器,提出了一个具有QoS能力的SIP代理服务器的设计方案,增加了策略决策功能( PDF)等网络实体,支持QoS的能力得到增强。文中详细讨论了支持QoS的SIP网络的增强能力,具有QoS能力的SIP代理服务器的功能结构,QoS功能模块,以及QoS资源授权和预留决策过程。
문중이해결VoIP계통적어음질량문제위목표,심입연구료기우SIP적VoIP계통QoS공제기술。삼조IMS망락결구,고필통신업무적QoS요구,연구이SIP위신령협의적VoIP계통여하진행호규공제、자원예류화책략결책,융입도SIP용호대리、SIP대리복무기,제출료일개구유QoS능력적SIP대리복무기적설계방안,증가료책략결책공능( PDF)등망락실체,지지QoS적능력득도증강。문중상세토론료지지QoS적SIP망락적증강능력,구유QoS능력적SIP대리복무기적공능결구,QoS공능모괴,이급QoS자원수권화예류결책과정。
It presents a design mode for QoS-capable SIP proxy server to solve the problem of the voice quality of VoIP systems. With reference to the network structure of IMS and considering the QoS requirements of the communications business,research how to integrate call control,resource reservation and policy decisions into the SIP user agent and SIP proxy server in the SIP-based VoIP system,propose a SIP-QoS proxy server with a Policy Decision Function ( PDF) and other network entities,so the ability to support QoS is enhanced. And it discusses the enhanced capabilities of the SIP for QoS required network in detail,as well as the functional structure of the QoS-ca-pable SIP proxy server,QoS functions module,QoS resources authorization processes and resources reservation decision-making.